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Journal of Materials Science: Materials in Electronics
Erschienen in: Journal of Materials Science: Materials in Electronics 4/2020

18.01.2020

Synthesis of ZnO/rGO nanocomposites by wet impregnation method for photocatalytic performance against RhB dye and 4-chlorophenol under UV light irradiation

verfasst von: N. Kumaresan, K. Ramamurthi

Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 4/2020

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Abstract

ZnO nanoparticles, known as one of the potential materials for photocatalytic application, were synthesized by template/surfactant-free hydrothermal method and annealed at different temperatures. Annealing the ZnO at 400 °C modified the rod-like structures into irregular shaped structures. Further, using wet impregnation method ZnO/reduced graphene oxide (rGO) nanocomposites were prepared for various amounts of rGO. Field emission scanning electron microscopy (FESEM) analysis revealed that ZnO/rGO (6 mg) nanocomposites contain both ZnO and rGO nanoparticles. Optical band gap of the as-synthesized ZnO nanoparticles was slightly shifted from 3.09 to 3.02 eV in ZnO/rGO (6 mg) nanocomposites. Photoluminescence spectral analysis showed that the electron–hole pair recombination rate is effectively suppressed in the ZnO/rGO (6 mg) nanocomposites. Further, the photocurrent measurements revealed that ZnO (annealed at 400 °C) acquires a photocurrent of 2.8 μA/cm2 and is increased to 4.8 μA/cm2 for ZnO/rGO (6 mg) nanocomposites. UV light irradiation exhibited that ZnO nanoparticles annealed at 400 °C show 94% degradation efficiency against Rhodamine B dye for 120 min. Further, ZnO/rGO (6 mg) nanocomposites acquired degradation efficiency of 94% against Rhodamine B dye for 20 min with a better cycling stability up to five cycles.
Vorheriger Artikel Low consumption design of hollow NiCo-LDH nanoflakes derived from MOFs for high-capacity electrode materials
Nächster Artikel Design and fabrication of hybrid carbon dots/titanium dioxide (CDs/TiO2) photoelectrodes for highly efficient dye-sensitized solar cells

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Metadaten
Titel
Synthesis of ZnO/rGO nanocomposites by wet impregnation method for photocatalytic performance against RhB dye and 4-chlorophenol under UV light irradiation
verfasst von
N. Kumaresan
K. Ramamurthi
Publikationsdatum
18.01.2020
Verlag
Springer US
Erschienen in
Journal of Materials Science: Materials in Electronics / Ausgabe 4/2020
Print ISSN: 0957-4522
Elektronische ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-020-02885-y

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